CN100341295C - WLAN transmitter having high data throughput - Google Patents

Abstract

A method for configuring a multiple input multiple output (MIMO) wireless communication begins by generating a first preamble for a first antenna of the MIMO communication, wherein the first preamble includes a carrier detect field, a first channel select field, a first signal field, and a second signal field. The method continues by generating a second preamble for at least one other antenna of the MIMO communication, wherein the second preamble includes the carrier detect field, a plurality of channel select fields, and the second signal field. The method continues by simultaneously transmitting the carrier detect field via the first antenna and the least one other antenna. The method continues by transmitting the first channel select field and the first signal field via the first antenna. The method continues by, subsequent to the transmitting the first channel select field and the first signal field via the first antenna, transmitting the plurality of channel select fields via the at least one other antenna. The method continues by simultaneously transmitting the second signal field via the first antenna and the at least one other antenna.

Description

WLAN reflector with high data throughput

Technical field

The present invention relates to wireless communication system, more specifically, the present invention relates to use the reflector of this wireless communication system with the High Data Rate emission.

Background technology

As everyone knows, communication system is supported radio communication and the wire communication between wireless and/or the wire communication facility.Such communication system comprises from national and/or international cell phone system, internet, point-to-point family wireless network.Make up and operate thus each communication system according to one or more communication standards.For example, can be according to one or more standards (including, but not limited to the various variations of IEEE802.11, bluetooth, advanced mobile phone service (AMPS), digital AMPS, global system for mobile communications (GSM), code division multiple access (CDMA), LMDS (LMDS), multichannel multi-point distribution system (MMDS) and/or standard) operate wireless communication systems.

The type that depends on wireless communication system, Wireless Telecom Equipment (such as cell phone, twoway radio, PDA(Personal Digital Assistant), personal computer (PC), portable computer, home entertainment device etc.) is communicated by letter with other Wireless Telecom Equipment directly or indirectly.For direct communication (the known point-to-point communication of people just), the Wireless Telecom Equipment that participates in is tuned to an identical channel or a plurality of channel (for example in a plurality of radio frequencies (RF) carrier wave of wireless communication system) with its receiver and reflector, and communicates by letter on these channels.For indirect radio communication, each Wireless Telecom Equipment is directly communicated by letter with associated base station (as for for the cellular services) and/or the access point (as for the wireless network in indoor or the building) that is associated via allocated channel.In order to finish communicating to connect between Wireless Telecom Equipment, associated base station and/or the access point that is associated directly, via system controller, via PSTN, come direct communication each other via the internet and/or via some other wide area network.

For each Wireless Telecom Equipment that participates in radio communication, it comprises built in radio transceiver (being receiver and reflector) or is connected to the radio set that is associated (promptly being used for base station, RF modulator-demodulator etc. in indoor and/or the building).As everyone knows, receiver is connected to antenna and comprises low noise amplifier, one or more intermediater-frequency stage, filtering stage and data recovery level.Low noise amplifier is via antenna reception of inbound RF signal, then with its amplification.One or more intermediater-frequency stages mix amplification RF signal amplification RF signal is converted to baseband signal or intermediate frequency (IF) signal with one or more local oscillations.Filtering stage with baseband signal or IF signal filtering so that the decay of unwanted out of band signal is used to produce filtering signal.Data are recovered level and are recovered initial data according to specific wireless communication standard from filtering signal.

Equally as everyone knows, reflector comprises data-modulated level, one or more intermediater-frequency stage and power amplifier.The data-modulated level converts initial data to baseband signal according to specific wireless communication standard.One or more intermediater-frequency stages mix baseband signal to produce the RF signal with one or more local oscillations.Before transmitting the RF signal via antenna, power amplifier amplifies the RF signal.

Typically, reflector comprises an antenna that is used for the transmitting RF signal, and by the single antenna of receiver, or multiple antenna receives this RF signal.When receiver comprises two or many antennas, receiver will select in these antenna to receive input rf signal.In this example, the radio communication between reflector and receiver is single output-list input (SOSI) communication technology, even receiver comprises as dispersing many antennas of antenna (promptly selecting one of them to receive input rf signal).For the SISO radio communication, transceiver comprises a reflector and a receiver.At present, most of wireless lan (wlan)s (IEEE 802.11,802.11a, 802.11b or 802.11g) adopt the SISO wireless communication technology.

The wireless communication technology of other type comprises single input-many outputs (SIMO), many input-list outputs (MISO) and many inputs-many outputs (MIMO).In the SIMO radio communication, single reflector processes data into radiofrequency signal, and this emission of radio frequency signals is arrived receiver.Receiver comprises two or many antennas and two or many receiver paths.Every antenna receives the RF signal and provides it to corresponding receiver path (for example LNA, frequency reducing module, filter and ADC).Every receiver path is handled the RF signal that receives producing digital signal, with this digital signal in conjunction with and with reprocessing to regain the emission data.

For many inputs-list output (MISO) radio communication, reflector comprises two or many emission paths (for example digital-analog convertor, filter, raising frequency module and power amplifier), each bar path converts the counterpart of baseband signal to the RF signal, via the antenna of correspondence this RF signal is transmitted into receiver.Receiver comprises the single collector path, and this receiver path is from transmitter receipt multichannel RF signal.In this example, receiver uses beam to form so that multichannel RF sets of signals is synthesized a signal so that handle.

For many inputs-many output (MIMO) radio communications, each in reflector and the receiver comprises many paths.In this communication, reflector usage space and time encoding function are come the parallel processing data, are used to produce two or more data flow.Reflector comprises that many emission paths convert each data flow to multichannel RF signal.Receiver receives multichannel RF signal via many receiver paths, and these many receiver path usage spaces and time encoding function regain data flow.Combination and the data flow that regains with reprocessing are to recover initial data.

Use various types of wireless communication technologys (for example SISO, MISO, SIMO and MIMO), can expect to use the wireless communication technology of one or more types to improve the data throughout among the WLAN.For example, compare, can obtain High Data Rate by the MIMO communication technology with the SISO communication technology.Yet most WLAN comprises traditional wireless communication equipment (promptly following the equipment than the wireless communication standard of early version).Equally, the reflector with mimo wireless communication ability also should be backwards-compatible so that move in the existing WLAN of great majority with legacy equipment.

Therefore, exist for have high-throughput and with the needs of the backwards-compatible WLAN reflector of legacy equipment.

Summary of the invention

The WLAN reflector that the present invention has high data throughput fully satisfies these and other needs.In one embodiment, the wireless lan (wlan) reflector comprises baseband processing module and a plurality of radio frequency (RF) reflector.The baseband processing module operability connects with by according to pseudo random sequence data scrambling (scrambling) being produced scrambling (scrambled) data.By selecting to continue data processing based on one in a plurality of coding modes of mode select signal.By the scrambled data coding being continued data processing to produce coded data according to one in a plurality of coding modes.By determining to continue data processing based on the quantity that the emission of mode select signal is flowed.Further continue data processing by coded data being converted to symbols streams according to the quantity of emission stream and mode select signal.Start in a plurality of RF reflectors several based on mode select signal and convert corresponding RF signal to, so that produce the RF signal of respective amount with a symbols streams with correspondence.

In another embodiment, the wireless lan (wlan) reflector with high data throughput comprises scrambling module, coding module, interleaving block, multiplexing module, a plurality of sign map module, a plurality of frequency domain-time domain modular converter, room and time coding module and a plurality of radio frequency (RF) reflector.With the scrambling module operability connect with according to pseudo random sequence with data scrambling, be used to produce scrambled data.The coding module operability is connected the scrambled data coding is used to produce coded data according to one in a plurality of coding modes, wherein select in a plurality of coding modes one according to mode select signal.The interleaving block operability is connected according to mode select signal coded data is interweaved, be used to produce interleaving data.The multiplexing module operability is connected interleaving data is converted to the one or more interleaved data streams based on mode select signal.In a plurality of sign map modules, activate one or more modules the interleaving data of the correspondence of one or more interleaved data streams stream is mapped to mapping symbols, the one or more mapping symbols streams of one or more generations of wherein a plurality of sign map modules according to mode select signal.In a plurality of frequency domains-time domain modular converter, the one or more correspondence circulations with one or more mapping symbols streams in them change time-domain symbol into, the one or more time-domain symbol streams of the one or more generations in wherein a plurality of frequency domains-time domain modular converter.Room and time coding module operability is connected one or more time-domain symbol circulations are changed into the time-domain symbol stream of one or more spaces adjusted.In a plurality of RF reflectors, change the one or more activation in the RF reflector into one or more RF signals with time-domain symbol circulation with one or more spaces adjusted based on mode select signal.

According to an aspect of the present invention, provide the reflector of the wireless lan (wlan) with high data throughput, this WLAN reflector comprises:

Baseband processing module, its operability connect with:

Receive data and mode select signal;

According to pseudo random sequence with data scrambling to produce scrambled data;

Select in a plurality of coding modes one based on mode select signal;

According to one of a plurality of coding modes with the scrambled data coding to produce coded data;

Determine to send the quantity that flows based on mode select signal, and

Convert coded data to symbols streams according to the quantity and the mode select signal that send stream; And

A plurality of radio frequencies (RF) reflector, wherein, based on mode select signal, can start in a plurality of RF reflectors several, wherein each of a plurality of RF reflectors of Qi Donging converts a symbols streams of correspondence to corresponding RF signal so that produce the RF signal of respective amount.

Preferably, the transform coding data also comprise:

With the sub-carrier interleaving of coded data on many symbols and channel to produce interleaving data;

Interleaving data is multiplexed into some interleaved data streams in parallel, and wherein the quantity of stream in parallel is corresponding to the quantity of emission stream.

For each interleaved data stream in parallel:

Interleaving data is mapped to quadrature amplitude modulation (QAM) symbol to produce frequency domain symbol;

Convert frequency domain symbol to time-domain symbol; And

With each time-domain symbol space encoding and time encoding that flows in parallel of interleaving data, to produce symbols streams.

Preferably, the room and time coding comprises at least one in the following process:

Use encoder matrix that the time-domain symbol room and time of a stream in parallel of interleaving data is encoded to a symbols streams; And

Use encoder matrix that the time-domain symbol room and time of the M road stream in parallel of interleaving data is encoded to P road symbols streams, wherein P=M+1.

Preferably, encoder matrix comprises form:

$\left[\begin{array}{ccccc}{C}_1& C_2& C_3& ...& C_{2M-1}\\ -C_2^{*}& {\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="C20051000955200372.png,C20051000955200401.png"\; state="\{\{state\}\}">C</figure-callout>}}_1^{*}& C_4& ...& C_{2M}\end{array}\right]$

Wherein the line number of encoder matrix is corresponding to M, and the columns of encoder matrix is corresponding to P.

Preferably, qam symbol comprises at least one in following:

Binary phase shift keying (BPSK);

Quadrature Phase Shift Keying (QPSK);

Complementary code keying (CCK);

16QAM；

64QAM; And

256QAM。

Preferably, mode select signal comprises the one or more indication in the following modes:

Frequency band 2.4GHz, channel width 20-22MHz, Maximum Bit Rate 54 MBPSs (Mbps);

Frequency band 5GHz, channel width 20MHz, Maximum Bit Rate 54Mbps;

Frequency band 2.4GHz, channel width 20MHz, Maximum Bit Rate 192Mbps;

Frequency band 5GHz, channel width 20MHz, Maximum Bit Rate 192Mbps; And

Frequency band 5GHz, channel width 40MHz, Maximum Bit Rate 486Mbps.

Preferably, each in a plurality of RF reflectors comprises:

The digital filter and (upsampling) module of upwards taking a sample, its operability connection also upwards is sampled as the filtering symbol with a symbols streams filtering with correspondence;

Digital-to-analog modular converter, its operability connect so that the filtering symbol transition is become analog signal;

Analog filter, its operability connects with analog signal filtering, is used to produce filtered analog signals;

Raising frequency module, its operability connect filtered analog signals is converted to the high-frequency signal based on local oscillation;

Power amplifier, its operability connects with amplifying high frequency signal, is used to produce the high-frequency signal of amplification; And

The RF filter, its operability connects with the RF signal filtering of will amplify, and is used to produce corresponding RF signal.

Preferably, WLAN also comprises:

Schema management person module, its operability connects to determine the mode select signal based on the WLAN operating condition, this WLAN operating condition comprises the agreement diversity of Wireless Telecom Equipment, and this Wireless Telecom Equipment is relevant with WLAN reflector ability with corresponding WLAN, target capability.

Preferably, according to one in a plurality of coding modes scrambled data encoded and comprises:

With 64 conditional codes on the scrambled data and generator polynomial g ₀=133 ₈And g ₁=171 ₈Carry out convolutional encoding to produce the convolutional encoding data;

With one in a plurality of speed the convolutional encoding data are shunk to produce coded data according to mode select signal.

Preferably, carrying out convolutional encoding also comprises:

With convolutional encoding and outside Read-Solomon code combination to produce the convolutional encoding data.

Preferably, according to one of a plurality of coding modes the scrambled data coding is comprised:

According to complementary code keying (CCK) sign indicating number scrambled data is encoded to produce coded data.

Preferably, coding also comprises:

With CCK sign indicating number and outside Read-Solomon code combination to produce the convolutional encoding data.

Preferably, according to one in a plurality of coding modes the scrambled data coding is comprised:

With 256 conditional codes on the scrambled data and generator polynomial g ₀=561 ₈And g ₁=753 ₈Carry out convolutional encoding to produce the convolutional encoding data;

With one in a plurality of speed the convolutional encoding data are shunk according to mode select signal.

Preferably, carrying out convolutional encoding also comprises:

With convolutional encoding and outside Read-Solomon code combination to produce the convolutional encoding data.

Preferably, according to one in a plurality of coding modes the scrambler digital coding is comprised in following at least one:

Link turbine coding (turbo encoding) scheme in parallel; And

Low-density checksum (LDPC) block encoding scheme.

According to an aspect of of the present present invention, the reflector of the local area network (LAN) (WLAN) with high data throughput is provided, the WLAN reflector comprises:

Scrambling module, its operability connect with according to pseudo random sequence with data scrambling, be used to produce scrambled data;

Coding module, its operability connect according to of a plurality of coding modes the scrambled data coding is used to produce coded data, wherein select in a plurality of coding modes one according to mode select signal;

Interleaving block, its operability connects according to mode select signal coded data is interweaved, and is used to produce interleaving data;

Multiplexing module, its operability connect interleaving data is converted to the one or more interleaved data streams based on mode select signal;

A plurality of sign map modules, wherein activate each among one or more in a plurality of sign map modules, the interleaving data of the correspondence of one or more interleaved data streams stream is mapped as mapping symbols, the one or more mapping symbols streams of the one or more generations in wherein a plurality of sign map modules according to mode select signal;

A plurality of frequency domains-time domain modular converter, among wherein a plurality of frequency domains-time domain modular converter one or more each is changed to time-domain symbol with correspondence circulation of one or more mapping symbols streams, the one or more time-domain symbol streams of the one or more generations in wherein a plurality of frequency domains-time domain modular converter;

Room and time coding module, its operability connect one or more time-domain symbol circulations are changed into the time-domain symbol stream of one or more spaces adjusted; And

A plurality of radio frequencies (RF) reflector wherein activates one or more RF reflectors based on mode select signal and changes one or more RF signals into the time-domain symbol circulation with one or more spaces adjusted.

Preferably, the room and time coding module also has following function:

Using encoder matrix is the time-domain symbol stream that one or more spaces are regulated with one or more time-domain symbol fluid spaces and time encoding; Perhaps

Use encoder matrix that the time-domain symbol room and time of M road time-domain symbol stream in parallel is encoded to the time-domain symbol stream of regulating in space, P road, wherein P=M+1.

Preferably, encoder matrix comprises form:

$\left[\begin{array}{ccccc}{C}_1& C_2& C_3& ...& C_{2M-1}\\ -C_2^{<figure-callout\; id="1"\; label="*\; C"\; filenames="C20051000955200372.png,C20051000955200401.png"\; state="\{\{state\}\}">*</figure-callout>}& C_{}^{}{}_1^{*}& C_4& ...& C_{2M}\end{array}\right]$

Wherein the line number of encoder matrix is corresponding to M, and the columns of encoder matrix is corresponding to P.

Preferably, when each of a plurality of sign map modules activates, interleaving data is mapped to quadrature amplitude modulation (QAM) frequency domain symbol, at least one in below this quadrature amplitude modulation frequency domain symbol comprises:

Binary phase shift keying (BPSK);

Quadrature Phase Shift Keying (QPSK);

Complementary code keying (CCK);

16QAM；

64QAM; And

256QAM。

Preferably, mode select signal comprises the one or more indication in the following modes:

Frequency band 2.4GHz, channel width 20-22MHz, Maximum Bit Rate 54 MBPSs (Mbps);

Frequency band 5GHz, channel width 20MHz, Maximum Bit Rate 54Mbps;

Frequency band 2.4GHz, channel width 20MHz, Maximum Bit Rate 192Mbps;

Frequency band 5GHz, channel width 20MHz, Maximum Bit Rate 192Mbps; And

Frequency band 5GHz, channel width 40MHz, Maximum Bit Rate 486Mbps.

Preferably, each of a plurality of RF reflectors comprises:

The digital filter and the sampling module that makes progress, its operability connection also upwards is sampled as the filtering symbol with the time-domain symbol stream filtering with the space adjusted;

Digital-to-analog modular converter, its operability connect so that the filtering symbol transition is become analog signal;

Analog filter, its operability connects with analog signal filtering, is used to produce filtered analog signals;

Raising frequency module, its operability connect filtered analog signals is converted to the RF signal based on local oscillation;

Power amplifier, its operability connects so that the RF signal is amplified, and is used to produce the RF signal of amplification; And

RF filter, its operability connect with the RF signal filtering, are used to produce corresponding RF signal.

Preferably, the WLAN reflector also comprises:

Schema management person module, its operability connects to determine the mode select signal based on the WLAN operating condition, this WLAN operating condition comprises the agreement diversity of Wireless Telecom Equipment, and this Wireless Telecom Equipment is relevant with WLAN reflector ability with corresponding WLAN, target capability.

Preferably, according to one of a plurality of coding modes with the coding module operability connect with by following process with the scrambler digital coding:

With 64 conditional codes on the scrambled data and generator polynomial g ₀=133 ₈And g ₁=171 ₈Carry out convolutional encoding to produce the convolutional encoding data;

With one in a plurality of speed the convolutional encoding data are shunk to produce coded data according to mode select signal.

Preferably, carrying out convolutional encoding also comprises:

With 1/2 speed convolutional encoding and outside Read-Solomon code combination, to produce the convolutional encoding data.

Preferably, according to one in a plurality of coding modes the coding module operability is connected by following process scrambled data is encoded:

According to complementary code keying (CCK) sign indicating number scrambled data is encoded to produce coded data.

Preferably, coding also comprises:

With CCK sign indicating number and outside Read-Solomon code combination to produce coded data.

Preferably, according to one in a plurality of coding modes the coding module operability is connected by following process scrambled data is encoded:

With 256 conditional codes on the scrambled data and generator polynomial g ₀=561 ₈And g ₁=753 ₈Carry out convolutional encoding to produce the convolutional encoding data; And

With one in a plurality of speed the convolutional encoding data are shunk according to mode select signal.

Preferably, carrying out convolutional encoding also comprises:

With convolutional encoding and outside Read-Solomon code combination to produce coded data.

Preferably, according to one in a plurality of coding modes the coding module operability is connected by in the following scheme at least one scrambled data is encoded:

Link turbine coding scheme in parallel; And

Low-density checksum (LDPC) block encoding scheme.

Description of drawings

Fig. 1 is the schematic block diagram according to wireless communication system of the present invention;

Fig. 2 is the schematic block diagram according to Wireless Telecom Equipment of the present invention;

Fig. 3 is the schematic block diagram according to RF reflector of the present invention;

Fig. 4 is the schematic block diagram according to RF receiver of the present invention;

Fig. 5 is the logic diagram that is used for the method for Data Base tape handling according to the present invention;

Fig. 6 is the logic diagram of method that further defines the step 120 of Fig. 5;

Fig. 7-9 illustrates the logic diagram that is used for the various embodiment of scrambled data coding according to of the present invention;

Figure 10 A and 10B are the schematic block diagram according to transmitting set of the present invention;

Figure 11 A and 11B are the schematic block diagram according to radio receiver of the present invention;

Figure 12 is the schematic block diagram according to channel encoder of the present invention;

Figure 13 is the schematic block diagram according to of the present invention minute encoder;

Figure 14 is the schematic block diagram according to the alternative embodiment of of the present invention minute encoder;

Figure 15 is the schematic block diagram according to 2/5 rate coding device of the present invention;

Figure 16 is the schematic block diagram according to puncturing code device of the present invention;

Figure 17 is the schematic block diagram according to another embodiment of puncturing code device of the present invention;

Figure 18 is the schematic block diagram according to low-density checksum coding device of the present invention; And

Figure 19 is the example according to digital multiplexer of the present invention.

Embodiment

Fig. 1 is the schematic block diagram of communication system 10, and this communication system 10 comprises a plurality of base stations and/or access point 12-16, a plurality of Wireless Telecom Equipment 18-32 and network hardware component 34.Wireless Telecom Equipment 18-32 can be portable main machine computer 18 and 26, personal digital assistant main frame 20 and 30, personal computer main frame 24 and 32 and/or cell phone main frame 22 and 28.The details of Wireless Telecom Equipment will be described in more detail with reference to figure 2.

Connect 36,38 and 40 via local area network (LAN) base station or access point 12-16 operability be connected to the network hardware 34.The network hardware 34 (can be router, switch, bridger, modulator-demodulator, system controller or the like) connects 42 for communication system 10 provides wide area network.Each of base station or access point 12-16 have relevant antenna or aerial array with Wireless Telecom Equipment at its intra-area communication.Typically, Wireless Telecom Equipment is registered to receive the business from communication system 10 with certain base station or access point 12-14.For direct connection (being point-to-point communication), Wireless Telecom Equipment is via the allocated channel direct communication.

Typically, the base station is used for the system of cell phone system and similar type, and access point is used for indoor or the interior wireless network of building.Each Wireless Telecom Equipment comprises built in radio equipment and/or is connected to wireless device, and irrelevant with the particular type of communication system.Wireless device disclosed herein comprise ultra-linear amplifier and/or programmable multistage amplifier with strengthen the property, minimizing expense, reduced in size, and/or improve broadband application.

Fig. 2 is the schematic block diagram of Wireless Telecom Equipment, and this Wireless Telecom Equipment comprises main process equipment 18-32 and associated radio 60.For the cell phone main frame, wireless device 60 is installed with built-in component.For personal digital assistant main frame, portable main machine and/or personal computer main frame, wireless device 60 can be installed with built-in component or outside coupling assembling.

As shown in the figure, main process equipment 18-32 comprises processing module 50, memory 52, radio interface 54, input interface 58 and output interface 56.Processing module 50 and memory 52 are carried out generally by the performed correspondence instruction of main process equipment.For example, for the cell phone main process equipment, processing module 50 is carried out corresponding communication function according to specific cellular telephony standard.

Radio interface 54 makes and can receive data and data are sent to wireless device 60 from wireless device 60.For the data (as inbound data) that receive from wireless device 60, radio interface 54 offers processing module 50 usefulness with data and is for further processing and/or routes to output interface 56.Output interface 56 makes the data that receive to be shown for output display unit (such as display, monitor, loud speaker etc.) provides connective.Radio interface 54 also will offer wireless device 60 from the data of handling module 50.Processing module 50 can receive outbound data or self generation data via input interface 58 from input equipment (such as keyboard, keypad, microphone etc.).For the data that receive via input interface 58, processing module 50 can be carried out corresponding host function and/or via radio interface 54 data be routed to wireless device 60 data.

Wireless device 60 comprises host interface 62, baseband processing module 64, memory 66, a plurality of radio frequency (RF)s (RF) reflector 68-72, emission/reception (T/R) module 74, many antenna 82-86, a plurality of RF receiver 76-80 and local oscillation module 100.Baseband processing module 64 combines with operational order in being stored in memory 66, respectively combine digital receiver function and digit emitter function.Digit receiver function (will be described in greater detail) with reference to figure 11B including, but not limited to intermediate frequency one baseband-converted, demodulation, star-likely go to shine upon, decode, deinterleave, fast fourier transform, Cyclic Prefix are eliminated, room and time decoding and/or descrambling.Digit emitter function (will be for a more detailed description) with reference to figure 5-19 including, but not limited to scrambler, encode, interweave, star-like mapping, modulation, contrary fast fourier transform, Cyclic Prefix are additional, room and time coding and/or digital baseband-IF conversion.Can use one or more treatment facilities to realize baseband processing module 64.Such treatment facility can be microprocessor, microcontroller, digital signal processor, microcomputer, central processing unit, field programmable gate array, programmable logic device, state machine, logical circuit, analog circuit, digital circuit and/or come any equipment of control signal (simulation and/or numeral) based on operational order.Memory 66 can be single memory equipment or multi-memory equipment.Such memory can be a read-only memory, random access memory, volatile memory, nonvolatile storage, static memory, dynamic memory, any equipment of flash memory and/or storing digital information.It should be noted that when processing module 64 realizes its one or more function via state machine, analog circuit, digital circuit and/or logical circuit, to comprise state machine, logical circuit, the circuit of digital circuit and/or logical circuit embeds the memory of storage respective operations instruction.

In operation, wireless device 60 receives outbound data 88 via host interface 62 from main process equipment.Baseband processing module 64 receives outbound data 88, and produces one or more departures symbols streams 90 based on mode select signal 102.Mode select signal 102 will be indicated concrete pattern (shown in the model selection table), and this model selection table appears at the end that originally goes through.For example, the mode select signal 102 of reference table 1 can be indicated the frequency band, 20 or the channel width of 22MHz, the Maximum Bit Rate of 54 mbit/of 2.4GHz.In this general categories, mode select signal will also be indicated the special speed that extends to 54 mbit/from 1 mbit/.In addition, mode select signal will be indicated the modulation of particular form, its including, but not limited to, buckle code modulated (Baker Code Modulation), BPSK, QPSK, CCK, 16QAM and/or 64QAM.In at table 1, further illustrate, the data bit (NDBPS) of the coded-bit (NCBPS) of the number of coded bits (NBPSC) of encoding rate and every subcarrier, every OFDM symbol, every OFDM symbol is provided, has been error vector magnitude (EVM), sensitivity (its indication obtains the needed maximal received power of target PER (as being 10% for IEEE802.11a)), adjacent channel inhibition (ACR) and the staggered adjacent channel inhibition (AACR) of unit with the decibel.

Mode select signal also can indicate the special channel of associative mode to select the associative mode of information in table 1 shown in the table 2.As shown in the figure, table 2 comprises channel quantity and corresponding centre frequency.Mode select signal can be gone back indicated horsepower spectrum density mask value, and this power spectral density masks value of table 1 has been shown in table 3.Perhaps, mode select signal can dial gauge speed in 4, table 4 has the Maximum Bit Rate of 5GHz frequency band, 20MHz channel width and 54 mbit/.Select if this is an AD HOC, the channel selection has been shown in the table 5.Select as another, but the Maximum Bit Rate of 2.4GHz frequency band, 20MHz channel and 192 mbit/ shown in mode select signal 102 dial gauges 6.In table 6, can use many antennas to reach higher bandwidth.In this embodiment, model selection also will be indicated the antenna amount that uses.Table 7 illustrates and is used for the channel selection that table 6 is set up.Table 8 also illustrates another kind of model selection scheme, and its midband is 2.4GHz, and channel width is 20MHz, and Maximum Bit Rate is 192 mbit/.[table 8 is 45GHz frequency bands.] corresponding table 8 comprises the various bit rates that use 2-4 root antenna (from 12 mbit/to 216 mbit/) and it is as shown in the table space time encoding rate.Table 9 illustrates the channel of table 8 and selects.Mode select signal 102 also can be indicated certain operational modes as shown in table 10, and this certain operational modes is corresponding to the 5GHz frequency band with 40MHz frequency band (this frequency band has the Maximum Bit Rate of 40MHz channel and 486 mbit/).As shown in table 10, use 1-4 root antenna and corresponding space time encoding rate, bit rate can be from 13.5 mbit/to 486 mbit/.Table 10 also illustrates specific modulation scheme encoding rate and NBPSC value.Table 11 provides power spectral density masks for table 10, and table 12 is selected for table 10 provides channel.

Baseband processing module 64 based on module select signal 102 produces one or more departures symbols streams 90 (as further describing with reference to figure 5-9) from dateout 88.For example, if the single transmitting antenna of mode select signal 102 indications is used for selecteed AD HOC, baseband processing module 64 will produce single departures symbols streams 90.Perhaps, if 2,3 or 4 antennas of mode select signal indication, baseband processing module 64 will produce 2,3 or 4 departures symbols streams 90 from dateout 88 corresponding to antenna amount.

The quantity that depends on the departures stream 90 that baseband module 64 produces, the RF reflector 68-72 of respective amount can convert departures symbols streams 90 to departures RF signal 92.To further describe the implementation of RF reflector 68-72 with reference to figure 3.Transmit/receive module 74 receives departures RF signal 92 and each departures RF signal is offered corresponding antenna 82-86.

When wireless device 60 was in receiving mode, transmit/receive module 74 received one or more inbound RF signals via antenna 82-86.T/R module 74 offers one or many RF receiver 76-80 with inbound RF signal 94.RF receiver 76-80 (will with reference to this RF receiver of figure 4 more detailed descriptions) converts inbound RF signal 94 to the inbound symbols streams 96 of respective amount.The quantity of inbound symbols streams 96 will be corresponding to the AD HOC that receives the data place (recalling pattern can be any of illustrated pattern among the table 1-12).Baseband processing module 60 reception of inbound symbols streams 90 also convert them to inbound data 98, via host interface 62 inbound data 98 are offered main process equipment 18-32.

One of ordinary skill in the art should be appreciated that, can use one or more integrated circuits to realize the Wireless Telecom Equipment of Fig. 2.For example, can on an integrated circuit, realize main process equipment, can on second integrated circuit, realize baseband processing module 64 and memory 66, can on the 3rd integrated circuit, realize the residue assembly (except that antenna 82-86) of wireless device 60.As an interchangeable example, can on single integrated circuit, realize wireless device 60.As another example, the processing module 50 of main process equipment and baseband processing module 64 can be the common process equipment of realizing on single integrated circuit.In addition, can realize memory 52 and memory 66 on the single integrated circuit and/or on the integrated circuit identical with the common process module of processing module 50 and baseband processing module 64.

Fig. 3 is the schematic block diagram of the embodiment of RF reflector 68-72.RF reflector 68-72 comprises digital filter and make progress sampling module 75, digital-to-analog modular converter 77, analog filter 79 and raising frequency module 81, power amplifier 83 and RF filter 85.Digital filter receives in the departures symbols streams 90 with the sampling module 75 that makes progress and with its digital filtering, the speed with symbols streams upwards is sampled to expected rate then, to produce filtering symbols streams 87.Digital-to-analog modular converter 77 converts filtering symbol 87 to analog signal 89.Analog signal can comprise with phase constituent and orthogonal component.

Analog filter 79 with analog signal 89 filtering to produce filtered analog signals 91.Raising frequency module 81 (it can comprise a pair of frequency mixer and filter), with filtered analog signals 91 and local oscillation 93 (it is produced by local oscillation module 100) mixing to produce high-frequency signal 95.The frequency of high-frequency signal 95 is corresponding to the frequency of RF signal 92.

Power amplifier 83 amplifies the high-frequency signal 97 that amplifies to produce with high-frequency signal 95.RF filter 85 (it can be a high freguency bandpass filter) is with the output RF signal 92 of amplifying high frequency signal 97 filtering with the generation expectation.

Should understand as persons skilled in the art, each of radio frequency emissions device 68-72 should comprise and similar structure shown in Figure 3, and comprise closing organ, and feasible when not needing the particular radio-frequency reflector, in the mode that does not produce interference signal and/or noise it is forbidden.

Fig. 4 is each the schematic block diagram among the RF receiver 76-80.In this embodiment, each among the RF receiver 78-80 all comprises RF filter 101, low noise amplifier (LNA) 103, programmable gain amplifier (PGA) 105, frequency reducing (down-conversion) module 107, analog filter 109, analog-digital conversion module 111 and digital filter and downsampled (down-sampling) module 113.RF filter 101 (it can be a high freguency bandpass filter) reception of inbound RF signal 94 and with its filtering to produce the inbound RF signal of filtering.Low noise amplifier 103 is provided with inbound RF signal 94 amplifications of filtering and with amplifying signal based on gain and offers programmable gain amplifier 105.Programmable gain amplifier further amplifies inbound RF signal before more inbound RF signal 94 being offered frequency reducing module 107.

Frequency reducing module 107 comprise a pair of frequency mixer, summation module and filter with local oscillation (LO) mixing that inbound RF signal and local oscillation module are provided to produce analog baseband signal.Analog filter 109 is with analog baseband signals and provide it to analog-digital conversion module 111, and this analog-digital conversion module 111 converts analog baseband signal to digital signal.Digital filter and downsampled module 113 are regulated sampling rate to produce inbound symbols streams 96 then with digital signal filter.

Fig. 5 is the logic diagram that is used for by baseband processing module 64 outbound data 88 being converted to the method for one or more departures symbols streams 90.This process is in step 110 beginning, and wherein baseband processing module receives outbound data 88 and mode select signal 102.Any in the various operator schemes of mode select signal shown in can dial gauge 1-12.Process enters step 112 then, wherein baseband processing module according to pseudo random sequence with data scrambling to produce scrambled data.It should be noted that to be S (x)=x from generator polynomial ⁷+ x ⁴+ 1 feedback shift register produces pseudo random sequence.

Process enters step 114 then, and wherein baseband processing module is selected based on one in a plurality of coding modes of mode select signal.Process enters step 116 then, and wherein baseband processing module is encoded scrambled data to produce coded data according to the coding mode of selecting.Can use link turbine coding scheme in parallel and/or low-density checksum block encoding scheme to realize this coding.To do more detailed description to this encoding scheme with reference to figure 12-19.Perhaps, can be according to the coding of realizing that is further described among Fig. 7-9 (hereinafter will describe these figure).

Process enters step 118 then, and wherein baseband processing module is determined some the transmission streams based on mode select signal.For example, mode select signal is selected AD HOC, and this pattern indication 1,2,3,4 or more antennas can be used for emission.Accordingly, send the quantity of stream corresponding to the indicated antenna amount of mode select signal.Process enters step 120 then, and wherein baseband processing module converts coded data to symbols streams according to the quantity that sends stream in the mode select signal.To do more detailed description with reference to 6 pairs of these steps of figure.

Fig. 6 is the logic diagram of the performed method of baseband processing module, and it converts coded data to symbols streams according to the quantity and the mode select signal that send stream.This process is in step 122 beginning, wherein baseband processing module with the sub-carrier interleaving of the coded data on a plurality of symbols and channel with the generation interleaving data.Generally speaking, interleaving process is designed to the coded data expansion on a plurality of symbols and transmission stream.This provides improved detection and error recovery ability on the receiver.In one embodiment, interleaving process will be followed the IEEE 802.11 (a) that is used for backward compatibility mode or (g) standard.Get pattern (as IEEE 802.11 (n)) for high-performance more, also will on many transmission paths or stream, interweave.

Process enters step 124 then, and wherein baseband processing module is multiplexed as a plurality of interleaved data streams in parallel with interleaving data.The quantity of stream in parallel sends stream conversely corresponding to the indicated antenna amount of AD HOC that uses corresponding to the quantity that sends stream.Process enters step 126 and 128 then, and wherein for each interleaved data stream in parallel, baseband processing module is mapped to interleaving data in quadrature amplitude modulation (QAM) symbol, to produce frequency domain symbol in step 126.In step 128, baseband processing module is converted to time-domain symbol (can use contrary fast fourier transform to finish) with frequency domain symbol.Frequency domain symbol is transformed into time-domain symbol can also comprise that the increase Cyclic Prefix is to eliminate the intersymbol interference at receiver place.It should be noted that the length and the Cyclic Prefix that in the pattern list of table 1-12, have defined contrary fast fourier transform.Generally speaking, 64 contrary fast fourier transform are used for the 20MHz channel, and 128 contrary fast fourier transform are used for the 40MHz channel.

Process enters step 130 then, and wherein baseband processing module encodes the time-domain symbol room and time of each stream in parallel of interleaving data to produce symbols streams.In one embodiment, room and time coding can be finished the symbols streams that the time-domain symbol room and time of the parallel connection stream of interleaving data be encoded to respective amount by using encoder matrix.Perhaps, the room and time coding can be encoded to P road symbols streams by the time-domain symbol room and time that uses encoder matrix that the M road parallel connection of interleaving data is flowed and realize, wherein P=M+1.In one embodiment, encoder matrix comprises following form:

$\left[\begin{array}{ccccc}{C}_1& C_2& C_3& ...& C_{2M-1}\\ -C_2^{<figure-callout\; id="1"\; label="*\; C"\; filenames="C20051000955200372.png,C20051000955200401.png"\; state="\{\{state\}\}">*</figure-callout>}& C_{}^{}{}_1^{*}& C_4& ...& C_{2M}\end{array}\right]$

Wherein the line number of encoder matrix is corresponding to M, and the columns of encoder matrix is corresponding to P.The occurrence of encoder matrix internal constant can be real number or imaginary number.

Fig. 7 is a kind of logic diagram of method, and baseband processing module can use this method so that scrambled data is encoded in the step 116 of Fig. 5.In the method, process starts from step 140, and wherein baseband processing module is with 64 conditional codes and G on the scrambled data ₀=133 ₈And G ₁=171 ₈Generator polynomial carry out convolutional encoding to produce the convolutional encoding data.Process enters step 142 then, and wherein baseband processing module shrinks the convolutional encoding data according to mode select signal with one in a plurality of speed, is used to produce coded data.It should be noted that shrinkage can comprise 1/2,2/3 and/or 3/4 and/or the table 1-12 in listed any shrinkage.What should be noted that makes, and for certain AD HOC, can select speed to be used for backwards-compatible IEEE802.11 (a) and/or IEEE 802.11 (g) speed.

The coding of Fig. 7 can also comprise optional step 144, wherein baseband processing module with convolutional encoding and outside Read-Solomon code combination to produce the convolutional encoding data.It should be noted that and answer executed in parallel step 144 and step 140.

Fig. 8 is the logic diagram of another coding method, and in the step 116 of Fig. 5, baseband processing module can use this coding method that scrambled data is encoded.In this embodiment, process starts from step 146, and wherein baseband processing module is encoded scrambled data to produce coded data according to complementary code keying (CCK) sign indicating number.This can realize according to IEEE802.11 (a) and/or IEEE802.11 (g) standard.Coding can comprise optional step 148 (this step and step 146 executed in parallel), step 148 with CCK sign indicating number and outside Read-Solomon code combination to produce coded data.

Fig. 9 is the logic diagram that is used for the another kind of method of the scrambled data of step 116 coding, can be by baseband processing module execution in step 116.In this embodiment, process starts from step 150, and wherein baseband processing module is with 256 conditional codes and G on the scrambled data ₀=561 ₈And G ₁=753 ₈Generator polynomial carry out convolutional encoding to produce the convolutional encoding data.Process enters step 152 then, and wherein baseband processing module shrinks coded data with one of a plurality of speed according to mode select signal, thereby produces coded data.It should be noted that the shrinkage of in table 1-12, having indicated associative mode.

The coding of Fig. 9 can also comprise optional step 154, wherein baseband processing module with convolutional encoding and outside Read-Solomon code combination to produce the convolutional encoding data.

Figure 10 A and 10B illustrate the schematic block diagram according to many reflectors of the present invention.In Figure 10 A, shown Base-Band Processing comprises scrambler 172, channel encoder 174, digital multiplexer 176, multiplexer 178, a plurality of symbol mapper 180-184, a plurality of contrary fast Fourier transform (FFT)/Cyclic Prefix add-on module 186-190 and space/clock coder 192.The baseband portion of reflector also can comprise schema management module 175, and this schema management module receiving mode is selected signal, produced the setting of transmitting set part and the rate selection of generation baseband portion.

In operation, scrambler 172 is added to outbound data bit 88 so that data are shown as random data with (in GF2) pseudo random sequence.Can be S (x)=x from generator polynomial ⁷+ x ⁴+ 1 feedback shift register generates pseudo random sequence, is used to produce scrambled data.Channel encoder 174 receives scrambled data and generates has redundant new sequence.This will improve the detection on the receiver.Channel encoder 174 can be operated among a kind of in the various modes.For example, for backwards-compatible with IEEE802.11 (a) and IEEE802.11 (g), the form of channel encoder is: have 1/2 rate convolutional encoder of 64 states, generator polynomial is G ₀=133 ₈And G ₁=171 ₈Can make the output of convolution coder be contracted to 1/2,2/3 and 3/4 speed according to special speed table (for example showing 1-12).For with the CCK mode back compatibility of IEEE802.11 (a) and IEEE802.11 (g), channel encoder has the form as the CCK sign indicating number of definition among the IEEE 802.11 (b).For High Data Rate (such as those values of explanation in the table 6,8 and 10), channel encoder can use the convolutional encoding identical with the above, perhaps channel encoder can use more powerful sign indicating number, comprise have more multi-mode convolution code, link in parallel (turbine) sign indicating number and/or low-density checksum (LDPC) block code.In addition, in these yards any one can be combined with outside Reed Solomon code.Based on balancing performance, downward compatibility and low the delay, one or more in these codes can be best.It should be noted that to describe in more detail in conjunction with Figure 12-19 and connect turbine coding and low-density checksum.

Digital multiplexer 176 received code data and with its expansion at many symbols with send on the stream.This provides improved detection and error recovery ability at the receiver place.In one embodiment, digital multiplexer 176 is followed IEEE802.11 (a) or (g) standard with backward compatibility mode.For high performance mode (such as those illustrated in the table 6,8 and 10 patterns) more, digital multiplexer will send on the stream data interlacing at pilosity.Multiplexer 178 will convert M road stream in parallel from the series connection weaving flow of digital multiplexer 176 to so that emission.

Each symbol mapper 180-184 receives a corresponding path the data path in parallel of M road from multiplexer.Each symbol mapper 180-182 lock is mapped to quadrature amplitude modulation qam symbol (as BPSK, QPSK, 16QAM, 64QAM, 256QAM or the like) according to Speedometer Drive (for example showing 1-12) with bit stream.For IEEE 802.11 (a) downward compatibility, can use two Gray codes (double gray coding).

The mapping symbols that each produced among the symbol mapper 180-184 is offered IFFT/ Cyclic Prefix add-on module 186-190, IFFT/ Cyclic Prefix add-on module 186-190 carries out frequency domain-time domain conversion and additional prefix, and this has eliminated the intersymbol interference on the receiver.It should be noted that the length that in the pattern list of table 1-12, has defined IFFT and Cyclic Prefix.Generally speaking, 64 IFFT are used for the 20MHz channel, and 128 IFFT are used for the 40MHz channel.

Space/clock coder 192 receives the M road alternate path of time-domain symbol and converts them to P road output symbol.In one embodiment, the quantity of P road output channel will equal the quantity of M road input channel.In one embodiment, the quantity of P road output channel will equal M+1 bar path.For each bar path, space/clock coder multiply by incoming symbol with encoder matrix, and this encoder matrix has following form:

$\left[\begin{array}{ccccc}{C}_1& C_2& C_3& ...& C_{2M-1}\\ -C_2^{<figure-callout\; id="1"\; label="*\; C"\; filenames="C20051000955200372.png,C20051000955200401.png"\; state="\{\{state\}\}">*</figure-callout>}& C_{}^{}{}_1^{*}& C_4& ...& C_{2M}\end{array}\right]$

Be noted that the quantity of the row of encoder matrix corresponding to input channel, the row of encoder matrix are corresponding to the quantity of output channel.

Figure 10 B illustrates the radio part of reflector, and reflector comprises that a plurality of digital filters/sampling module 194-198, digital-to-analog modular converter 200-204, analog filter 206-216, I/Q modulator 218-222, RF amplifier 224-228, RF filter 230-234 and antenna 236-240 make progress.By each digital filtering/upwards sampling module 194-198 receives the P road output from space/clock coder 192.

In operation, the quantity of activated wireless electric pathway is corresponding to the quantity of P road output.For example, if only produce a P road output channel, then only there is a radio route to activate.One of ordinary skill in the art is to be understood that the quantity of output channel can be the quantity to expectation.

Digital filtering/the sampling module 194-198 that makes progress is with corresponding symbol filtering and regulate sampling rate with corresponding with the expectation sampling rate of digital-to-analog modular converter 200-204.Digital-to-analog modular converter 200-204 converts the digital filtering and the sampled signal that makes progress to corresponding in-phase signal and orthogonal simulation signal.Analog filter 208-214 is the same phase constituent and/or the orthogonal component filtering of the correspondence of analog signal, and filtering signal is offered corresponding I/Q modulator 218-222.I/Q modulator 218-222 (it is produced by local oscillator 100) based on local oscillation converts i/q signal to radiofrequency signal.

RF amplifier 224-228 amplifies the RF signal, subsequently again with signal via before the antenna 236-240 emission via RF filter 230-234 with this signal filtering.

Figure 11 A and 11B illustrate the schematic block diagram according to another embodiment of receiver of the present invention.Figure 11 A illustrates the simulation part of receiver, and this receiver comprises many receiver paths.Every the receiver path comprises antenna, RF filter 252-256, low noise amplifier 258-260, i/q demodulator 264-268, analog filter 270-280, analogue-to-digital converters 282-286, digital filter and downsampled module 288-290.

In operation, antenna reception of inbound RF signal, via RF filter 252-256 with this RF signal bandpass filtering.Corresponding low noise amplifier 258-260 amplifies filtering signal and filtering signal is offered corresponding i/q demodulator 264-268.I/q demodulator 264-268 (it is produced by local oscillator 100) based on local oscillation is base band homophase and orthogonal simulation signal with the RF signal down.

Corresponding simulating filter 270-280 is respectively with homophase and the filtering of orthogonal simulation composition.Analogue-to-digital converters 282-286 becomes digital signal with homophase with the orthogonal simulation conversion of signals.Digital filtering and downsampled module 288-290 are with digital signal filter and regulate sampling rate so that it is corresponding with Base-Band Processing speed, will describe Base-Band Processing in Figure 11 B.

Figure 11 B illustrates the Base-Band Processing of receiver.Base-Band Processing comprises space/temporal decoder 294, a plurality of fast Fourier transform (FFT)s/Cyclic Prefix cancellation module 296-300, a plurality of symbols remove mapping block 302-306, multiplexer 308, remove digital multiplexer 310, channel decoder 312 and descrambling module 314.Baseband processing module can also comprise schema management module 175.Space/time decoder module 294 (it carries out the reverse function of space/temporal decoder 192) receives the input of P road and produces M road output channel from the receiver path.Handle M road path via FFT/ Cyclic Prefix cancellation module 296-300, this FFT/ Cyclic Prefix cancellation module is carried out the reverse function of IFFT/ Cyclic Prefix add-on module 186-190 to produce frequency domain symbol.

Symbol goes mapping block 302-306 to use the inverse process of symbol mapper 180-184 to convert frequency domain symbol to data.Multiplexer 308 will go mapping symbols stream to be combined into the unipath.

Go digital multiplexer 310 to use the reverse function of the function of carrying out by digital multiplexer 176 that the unipath is deinterleaved.Then deinterleaved data is offered channel decoder 312, this channel decoder 312 is carried out the reverse function of channel decoder 174.Descrambler 314 receives decoded data and carries out the reverse function of scrambler 172, to produce inbound data 98.

Figure 12 is the schematic block diagram as the channel encoder 174 of turbine decoder realization.In this embodiment, turbo coder receives input bit, changes them, handles them and they are interweaved to produce corresponding codes output via minute encoder 320-322.Depend on specific sign map (BPSK, QPSK, 8PSK (phase shift keying), 64QAM or 16APSK (APK amplitude phase shift keying)), turbo coder moves in the same manner to produce coded data.For example, for 2 bit symbol pieces, π ₀And π ₁Be respectively MSB (most significant bit) and LSB (the most invalid bit) interweave π _L ^-1, L=0 is reciprocal, interweaving of changing so is as follows:

${\mathrm{\&pi;}}^{\&prime;\&prime;}l\left(i\right)=\left(\begin{array}{c}i:i\mathrm{mod}2=0\\ \mathrm{\&pi;}-1\left(i\right):i\mathrm{mod}2=1\end{array}\right)$ And

${\mathrm{\&pi;}}^{\&prime;}\left(i\right)=\left(\begin{array}{c}i:i\mathrm{mod}2=1\\ \mathrm{\&pi;}\left(i\right):i\mathrm{mod}2=0\end{array}\right)$

Figure 13 illustrates the embodiment of the branch encoder 320-322 of Figure 12, this minute encoder can be realized as 1/2 rate coding device.

Figure 14 illustrates the schematic block diagram of another embodiment of branch encoder 320-322, this minute encoder use 1/2 rate coding device to produce 2/5 rate coding device.In this embodiment, two continuous binary outputs are sent to 1/2 rate coding device.Produce the output of 2/5 rate coding device as shown in the figure.

Figure 15 represents the general utility functions of Figure 14.Then can be with 2/5 rate coding device as the puncturing code device as shown in Figure 16 and 17, this puncturing code utensil has relative QPSK mapping.

Figure 18 illustrates channel encoder 174, and it is realized as low-density checksum (LDPC) encoder.In this embodiment, encoder comprises low-density checksum coding device 174, digital multiplexer 176 and gray mappings (gray mapping) module 177.Block length can be 2000, and message length can be 1600.In this embodiment, low-density checksum binary matrix H=[H1, H2], wherein H1 is irregular 400 * 1600 low density matrix, it has 1400 and is weighted to 3 row and 200 and is weighted to 7 row, and the whole row that are weighted to 14.In addition, the 1st, the realizing of pseudo-random distribution so that be fit to hardware.Matrix H 2 is 400 * 400 matrixes, and this matrix provides long path, and does not have loop in the bipartite graph between redundant bit node and check-node.

$H2=\left|\begin{array}{c}100...00\\ 11\_...00\\ \_11...00\\ ...\\ 000...10\\ 000...11\end{array}\right|$

Parity matrix provides simple coding.This yard do not have and is less than 6 loop.During the number of degrees of sign indicating number bipartite graph distribute and are listed in the table below.The sum at the edge of figure is 6399.

Bit node degree (from the number of edges of bit stage transmission)	The node number
		1	1
2	399
		3	1400
7	200

The check-node degree
		15	1
16	399

Figure 19 illustrates specific the interweaving that can be used by the encoder of Figure 18.In this embodiment, encoding rate can be 1/2, and the LDPC sign indicating number is symmetrical.Equally, interweave as shown in the figure.

Should be appreciated that term used herein " basically " or " approx " as those of ordinary skill in the art, for the term of correspondence provides industrial acceptable tolerance.Industrial acceptable tolerance like this from less than one of percentage to 20 percent, and corresponding but be not limited to component value, integrated circuit process variations, variations in temperature, rising and fall time and/or thermal noise.Should also be appreciated that as those of ordinary skill in the art, term used herein " operability connection " comprises direct connection and via another assembly, element, the indirect connection of circuit or module, for indirect connection, assembly, element, circuit or the module that participates in do not change the information of signal, but its current level of scalable, voltage level and/or power level.Should be appreciated that as those of ordinary skill in the art the connection (promptly wherein by infer an element is connected to another element) of deduction is included between two elements direct with indirect being connected in the mode identical with " operability connection ".It is also understood that as those of ordinary skill in the art that term used herein " advantageously compares " to refer to and between two or more elements, item, signal etc., relatively provide expected relationship.For example, when expectation relation is the amplitude of signal 1 when bigger than the amplitude of signal 2, then, just can obtain favourable comparison when the amplitude of signal 1 during greater than the amplitude of signal 2 or when the amplitude of signal 2 during less than the amplitude of signal 1.

Many inputs of being used for wireless communication system/export various embodiment of transceiver have been set forth in previous discussion, and one of ordinary skill in the art can be understood the embodiment that can obtain other under the prerequisite of the protection range that or else breaks away from claim from teaching of the present invention.

The model selection table:

Table 1:2.4GHz, 20/22MHz channel width, 54Mbps Maximum Bit Rate

Speed	Modulation	Encoding rate	NBPSC	NCBPS	NDBPS	EVM	Sensitivity	ACR	AACR
											1 2 5.5 6 9 11 12 18 24 36 48 54	Buckle BPSK buckle QPSK CCK BPSK BPSK CCK QPSK QPSK 16QAM 16QAM 64QAM 64QAM	0.5 0.75 0.5 0.75 0.5 0.75 0.666 0.75	1 1 2 2 4 4 6 6	48 48 96 96 192 192 288 288	24 36 48 72 96 144 192 216	-5 -8 -10 -13 -16 -19 -22 -25	-82 -81 -79 -77 -74 -70 -66 -65	16 15 13 11 8 4 0 -1	32 31 29 27 24 20 16 15

Table 2: the channel of table 1 is selected:

Channel	Frequency (MHz)
		1 2 3 4 5 6 7 8 9 10 11 12	2412 2417 2422 2427 2432 2437 2442 2447 2452 2457 2462 2467

Table 3: the power spectral density of table 1 (PSD) shielding

The skew of PSD screening frequencies	1dBr
		-9MHz to 9MHz+/-11MHz+/-20MHz+/-30MHz and more than	0 -20 -28 -50

Table 4:5GHz, 20MHz channel width, 54Mbps Maximum Bit Rate

Speed	Modulation	Encoding rate	NBPSC	NCBPS	NDBPS	EVM	Sensitivity	ACR	AACR
										6 9 12 18 24 36 48 54	BPSK BPSK QPSK QPSK 16QAM 16QAM 64QAM 64QAM	0.5 0.75 0.5 0.75 0.5 0.75 0.666 0.75	1 1 2 2 4 4 6 6	48 48 96 96 192 192 288 288	24 36 48 72 96 144 192 216	-5 -8 -10 -13 -16 -19 -22 -25	-82 -81 -79 -77 -74 -70 -66 -65	16 15 13 11 8 4 0 -1	32 31 29 27 24 20 16 15

Table 5: the channel of table 4 is selected

The national channel frequency of channel frequency (MHz) (MHz) country

240 4920 Japan

244 4940 Japan

248 4960 Japan

252 4980 Japan

8 5040 Japan

12 5060 Japan

16 5080 Japan

36 5180 U.S./Europe 34 5170 Japan

40 5200 U.S./Europe 38 5190 Japan

44 5220 U.S./Europe 42 5210 Japan

48 5240 U.S./Europe 46 5230 Japan

52 5260 U.S./Europe

56 5280 U.S./Europe

60 5300 U.S./Europe

64 5320 U.S./Europe

100 5500 U.S./Europe

104 5520 U.S./Europe

108 5540 U.S./Europe

112 5560 U.S./Europe

116 5580 U.S./Europe

120 5600 U.S./Europe

124 5620 U.S./Europe

128 5640 U.S./Europe

132 5660 U.S./Europe

136 5680 U.S./Europe

140 5700 U.S./Europe

149 5745 U.S.

153 5765 U.S.

157 5785 U.S.

161 5805 U.S.

165 5825 U.S.

Table 6:2.4GHz, 20MHz channel width, 192Mbps Maximum Bit Rate

Speed	The TX antenna	The ST code rate	Modulation	Encoding rate	NBPSC	NCBPS	NDBPS
									12 24 48 96 108 18 36 72 144 162 24 48 96 192 216	2 2 2 2 2 3 3 3 3 3 4 4 4 4 4	1 1 1 1 1 1 1 1 1 1 1 1 1 1 1	BPSK QPSK 16QAM 64QAM 64QAM BPSK QPSK 16QAm 64QAM 64QAM BPSK QPSK 16QAM 64QAM 64QAM	0.5 0.5 0.5 0.666 0.75 0.5 0.5 0.5 0.666 0.75 0.5 0.5 0.5 0.666 0.75	1 2 4 6 6 1 2 4 6 6 1 2 4 6 6	48 96 192 288 288 48 96 192 288 288 48 96 192 288 288	24 48 96 192 216 24 48 96 192 216 24 48 96 192 216

Table 7: the channel of table 6 is selected

Channel	Frequency (MHz)
		1 2 3 4 5 6 7 8 9 10 11 12	2412 2417 2422 2427 2432 2437 2442 2447 2452 2457 2462 2467

Table 8:5GHz, 20MHz channel width, 192Mbps Maximum Bit Rate

Speed	The TX antenna	The ST code rate	Modulation	Encoding rate	NBPSC	NCBPS	NDBPS
									12 24 48 96 108 18 36 72 144 162 24 48 96 192 216	2 2 2 2 2 3 3 3 3 3 4 4 4 4 4	1 1 1 1 1 1 1 1 1 1 1 1 1 1 1	BPSK QPSK 16QAM 64QAM 64QAM BPSK QPSK 16QAM 64QAM 64QAM BPSK QPSK 16QAM 64QAM 64QAM	0.5 0.5 0.5 0.666 0.75 0.5 0.5 0.5 0.666 0.75 0.5 0.5 0.5 0.666 0.75	1 2 4 6 6 1 2 4 6 6 1 2 4 6 6	48 96 192 288 288 48 96 192 288 288 48 96 192 288 288	24 48 96 192 216 24 48 96 192 216 24 48 96 192 216

Table 9: the channel of table 8 is selected

The national channel frequency of channel frequency (MHz) (MHz) country

240 4920 Japan

244 4940 Japan

248 4960 Japan

252 4980 Japan

8 5040 Japan

12 5060 Japan

16 5080 Japan

36 5180 U.S./Europe 34 5170 Japan

40 5200 U.S./Europe 38 5190 Japan

44 5220 U.S./Europe 42 5210 Japan

48 5240 U.S./Europe 46 5230 Japan

52 5260 U.S./Europe

56 5280 U.S./Europe

60 5300 U.S./Europe

64 5320 U.S./Europe

100 5500 U.S./Europe

104 5520 U.S./Europe

108 5540 U.S./Europe

112 5560 U.S./Europe

116 5580 U.S./Europe

120 5600 U.S./Europe

124 5620 U.S./Europe

128 5640 U.S./Europe

132 5660 U.S./Europe

136 5680 U.S./Europe

140 5700 U.S./Europe

149 5745 U.S.

153 5765 U.S.

157 5785 U.S.

161 5805 U.S.

165 5825 U.S.

Table 10:5GHz, 40MHz channel width, 486Mbps Maximum Bit Rate

Speed	The TX antenna	The ST code rate	Modulation	Encoding rate	NBPSC
						13.5Mbps 27Mbps 54Mbps 108Mbps 121.5Mbps 27Mbps 54Mbps 108Mbps 216Mbps 243Mbps 40.5Mbps 81Mbps 162Mbps 324Mbps 365.5Mbps 54Mbps 108Mbps 216Mbps 432Mbps 486Mbps	1 1 1 1 1 2 2 2 2 2 3 3 3 3 3 4 4 4 4 4	1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1	BPSK QPSK 16QAM 64QAM 64QAM BPSK QPSK 16QAM 64QAM 64QAM BPSK QPSK 16QAM 64QAM 64QAM BPSK QPSK 16QAM 64QAM 64QAM	0.5 0.5 0.5 0.666 0.75 0.5 0.5 0.5 0.666 0.75 0.5 0.5 0.5 0.666 0.75 0.5 0.5 0.5 0.666 0.75	1 2 4 6 6 1 2 4 6 6 1 2 4 6 6 1 2 4 6 6

Table 11: the power spectrum density of table 10 (PSD) shielding

The skew of PSD screening frequencies	2dBr
		-19MHz to 19MHz+/-21MHz+/-30MHz+/-40MHz and more than	0 -20 -28 -50

Table 12: the channel of table 10 is selected

The national channel frequency of channel frequency (MHz) (MHz) country

242 4930 Japan

250 4970 Japan

12 5060 Japan

38 5190 U.S./Europe 36 5180 Japan

46 5230 U.S./Europe 44 5520 Japan

54 5270 U.S./Europe

62 5310 U.S./Europe

102 5510 U.S./Europe

110 5550 U.S./Europe

118 5590 U.S./Europe

126 5630 U.S./Europe

134 5670 U.S./Europe

151 5755 U.S.

159 5795 U.S.

Claims (10)

1. the wireless LAN transmitter that has high data throughput, described wireless LAN transmitter comprises:

Baseband processing module is used for:

Receive data and mode select signal;

According to pseudo random sequence with described data scrambling to produce scrambled data;

Select in a plurality of coding modes one based on described mode select signal;

According to described a plurality of coding modes described scrambled data is encoded to produce coded data;

Determine a plurality of transmission streams based on described mode select signal; And

Quantity and described mode select signal according to described transmission stream convert described coded data to symbols streams; And

A plurality of radiofrequency launchers, wherein, based on described mode select signal, start a plurality of in described a plurality of radiofrequency launcher, wherein each in described a plurality of radiofrequency launchers of Qi Donging converts a symbols streams of correspondence to corresponding radiofrequency signal to produce the radiofrequency signal of respective amount.

2. wireless LAN transmitter according to claim 1 is characterized in that: the described coded data of described conversion also comprises:

With the sub-carrier interleaving of described coded data on a plurality of symbols and channel to produce interleaving data;

The a plurality of parallel connections that described interleaving data are multiplexed into interleaving data are flowed, and wherein the described quantity of stream in parallel is corresponding to sending the described quantity that flows;

For each described stream in parallel of interleaving data:

Described interleaving data is mapped as the quadrature amplitude modulation symbol to produce frequency domain symbol;

Described frequency domain symbol is converted to time-domain symbol; And

Each described described time-domain symbol room and time that flows in parallel of described interleaving data is encoded to produce described symbols streams.

3. wireless LAN transmitter according to claim 2 is characterized in that: described room and time coding comprises following at least one:

The time-domain symbol room and time that uses encoder matrix that a described parallel connection of interleaving data is flowed is encoded to of described symbols streams; And

Use described encoder matrix that the described time-domain symbol room and time of the M road stream in parallel of described interleaving data is encoded to P road symbols streams, P=M+1 herein.

4. wireless LAN transmitter according to claim 3 is characterized in that: described encoder matrix comprises following form:

$\left[\begin{array}{ccccc}{C}_1& C_2& C_3& ...& C_{2M-1}\\ -C_2^{*}& C_1^{*}& C_4& ...& C_{2M}\end{array}\right]$

The line number of wherein said encoder matrix is corresponding to M, and the columns of described encoder matrix is corresponding to P.

5. wireless LAN transmitter according to claim 2 is characterized in that: described quadrature amplitude modulation symbol comprise following at least one:

Binary phase shift keying;

Quadrature Phase Shift Keying;

Complementary code keying;

16QAM；

64QAM; And

256QAM。

6. the wireless LAN transmitter that has high data throughput, described wireless LAN transmitter comprises:

Scrambling module, it is used for according to pseudo random sequence data scrambling is used to produce scrambled data;

Coding module, it is used for according to one of a plurality of coding modes described scrambled data coding being used to produce coded data, wherein selects in described a plurality of coding mode one according to mode select signal;

Interleaving block, it is used for according to described mode select signal described coded data being interweaved, and is used to produce interleaving data;

Multiplexing module, it is used for converting described interleaving data to based on described mode select signal one or more interleaved data streams;

A plurality of sign map modules, wherein activate each among one or more in described a plurality of sign map module, the described interleaving data of the correspondence of described one or more interleaved data streams stream is mapped as mapping symbols, the one or more mapping symbols streams of the one or more generations in wherein said a plurality of sign map modules according to described mode select signal;

A plurality of frequency domains-time domain modular converter, among wherein said a plurality of frequency domain-time domain modular converter one or more each is changed to time-domain symbol with correspondence circulation of described one or more mapping symbols streams, the one or more time-domain symbol streams of the one or more generations in wherein said a plurality of frequency domains-time domain modular converter;

The room and time coding module, it is used for described one or more time-domain symbol circulations are changed into the time-domain symbol stream of one or more spaces adjusted; And

A plurality of radiofrequency launchers wherein activate one or more radiofrequency launchers based on described mode select signal and change one or more radiofrequency signals into the time-domain symbol circulation with described one or more spaces adjusted.

7. wireless LAN transmitter according to claim 6 is characterized in that: described room and time coding module also has following function:

Using encoder matrix is the time-domain symbol stream that one or more spaces are regulated with described one or more time-domain symbol fluid spaces and time encoding; Perhaps

Use described encoder matrix that the described time-domain symbol room and time of M road time-domain symbol stream in parallel is encoded to the time-domain symbol stream of regulating in space, P road, wherein P=M+1.

8. wireless LAN transmitter according to claim 7 is characterized in that: described encoder matrix comprises form:

$\left[\begin{array}{ccccc}{C}_1& C_2& C_3& ...& C_{2M-1}\\ -C_2^{*}& C_1^{*}& C_4& ...& C_{2M}\end{array}\right]$

The line number of wherein said encoder matrix is corresponding to M, and the columns of described encoder matrix is corresponding to P.

9. wireless LAN transmitter as claimed in claim 6, it is characterized in that: when each of described a plurality of sign map modules activates, described interleaving data is mapped to the quadrature amplitude modulation frequency domain symbol, described quadrature amplitude modulation frequency domain symbol comprise below at least one:

Binary phase shift keying;

Quadrature Phase Shift Keying;

Complementary code keying;

16QAM；

64QAM; And

256QAM。

10. wireless LAN transmitter as claimed in claim 6 is characterized in that: described mode select signal comprises the indication of one or more following modes:

Frequency band 2.4GHz, channel width 20-22MHz, Maximum Bit Rate 54 MBPSs (Mbps);

Frequency band 5GHz, channel width 20MHz, Maximum Bit Rate 54Mbps;

Frequency band 2.4GHz, channel width 20MHz, Maximum Bit Rate 192Mbps;

Frequency band 5GHz, channel width 20MHz, Maximum Bit Rate 192Mbps; And

Frequency band 5GHz, channel width 40MHz, Maximum Bit Rate 486Mbps.

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